Tip: What to do if your Neighbors go missing
You must uninstall the game and then reinstall it..
Images below will help you with this task
YOU WILL NOT LOSE YOUR PLACE IN THE GAME
1. Go to Settings
2. Choose Apps
3. Choose FV2
4. Click Edit settings
5. Choose uninstall App
6. Find a game post and click it and answer yes to the question asked .. You'll then have your farm and your neighbors will return..
TIP .. AFTER You UNINSTALL .. You'll need to log out of Facebook , then log back in and do your reinstall .. Happy Farming